Knock-down shoe for furnaces



Oct. 4, 1938. J H'QLUB 2,131,804

KNOCK-DOWN SHOE FOR FURNACES Filed July 24, 1957 v 4 Q m J I i6 ,2 H 1/ i M J v %Z6 m I [I X v m I7Z$6flflf JOHNMHO UB Patented Oct. 4, 1938 PATENT OFFICE KNOCK-DOWN SHOE FOR FURNACES,

John J. Holub, Cicero, Ill. 7 Application July 24,1937, Serial No. 155,425

1 Claim.

My invention relates to shoes, boots; and the like for furnaces and other air distributing apparatus.

.In its. present embodiment my invention is shown as especially adapted for installation at the outer shell or casing of a warm-air furnace or heater for connecting the return-pipe or conduit to the furnace shell. It will be understood, however,.that the structure I have herein disclosed is equally applicable to air distributors other than warm-air furnaces and heaters.

The structure whichI have invented is in the form of a hollow body, one portion of which body is of a rectangular cross-section and is usually horizontally disposed. The remaining portion of said body is of a cylindrical or substantially cylindrical shape in cross-section and merges into the rectangular portion, and said cylindrical portion is disposed with its axis oblique to and is inclined upwardly from the axis of the rectangular portion. 5

When an ordinary shoe or boot has been-assembledat a factory it is quite cumbersome-and occupies considerable space, and since there are usually twoshoes or boots foreachwarm-air furnace it has heretofore been the practice, when shipping a complete outfit, tostore some ofthe smaller parts or fittings inside these shoesor boots. When, however, a large quantity of shoes or boots are stored or shipped without other parts or fittings they occupy considerable cubeageso that only a relatively small number maybe stored in a transport vehicle such as truck or railway freightcar.

I have invented -a. shoe, boot, or the like that is of a knock-down character and the parts are made in such manner that a quantity of each part may be readily nested together for storage or shipment, with the result that a large quantity may thus be taken care of in a space of relatively small cubeage. The parts, which are preferably two in number, may be readily and quickly assembled when it is desired to use them and this operation may be done without the use of special tools or apparatus and performed by persons unskilled in the art.

The shoe or the like comprises generally two superposed sections, the upper section being an inverted U-shape with a substantially semi-circular extension formed integral with it and disposed oblique thereto, and the other or lower section is a substantially flat plate and a curved or semi-cylindrical portion disposed oblique to the flat plate. The margins of the two sections are coincident with and substantially parallel to each other, and interengaging meansare provided along the proximate edges of said sections Whereby they are maintained in knock-down assemb1y.- I have also provided means at the outer edge of the cylindrical extension for detachably connecting the lower end of the return pipe to theshoe-q q p In devising my improved shoe, boot and the like I have numerous objects in view. One of these objects is to provide a shoe or the like that is novel in construction; other objects are to provide a structure that is effective and dependable in performing its functions; which is made of sturdy but simple parts and is capable of withstanding severe usage; and which is economical to manufacture so that it may be sold for a reasonable retail price. Other objects and advantages of my shoe or the like will be obvious to persons skilled in the. art after my invention is understood from the. withindisclosure.

, I prefer to accomplish the numerous objects of my invention and to practice the same by means of a structure substantially as set .forth in the following description and as more particularly pointed out in the appended claim. I now make reference to the accompanying drawing that forms a part of this specification.

In the drawing:

figure 1 is a vertical side elevation of my invention showing'the shoe installed upon the casing'of a warm-air furnace or other air distributor.

Figure 2 is a view slightly enlarged showing the severalparts in detached positions and about to berassembledv Figure 3 is a transverse fragmentary section on line 33 of Figure 1 drawn to a full-size scale.

Figure 4 is a similar section taken on line 4-4 of Figure 1.

Figure 5 is another similar section taken on line 5--5 of Figure 1.

The drawing, it will be understood, is somewhat schematic for the purpose of illustrating a typical or preferred embodiment of my invention, and in said drawing like reference characters refer to like parts wherever these parts appear in the different views.

As hereinbefore stated the shoe or the like is a knock-down structure and for this purpose it is made in the several separable parts or sections. These separable parts or sections are designated in Figure 2 as A, B, and C. The shoe proper comprises the superposed sections A and B. The section C is a piece of cylindrical conductor pipe I!) having an oblique lower edge that is provided with a bead II and a flaring annular flange l2, the latter adapted to be engaged inside and clamped by the beads I3 and I4 at the adjacent or proximate edges of the respective sections A and B of the shoe as shown in detail in Figure 5.

The upper section A of the boot comprises a bent piece of sheet-metal the portion of which that is nearest the furnace shell D being bent into an inverted U-shape with angular corners to provide vertical sidewalls l5 and a top wall Hi. This portion of the shoe section is disposed upon a horizontal axis, and extending obliquely upward from the outer portion thereof is an extension that is substantially semicylindrical; r

arcuate and identified as II in, the drawing, The lower margins of the metal forming the section A of the shoe is provided with means. that interengage with the margins of the lower section B that are coincident with and parallel thereto. These means are S-shape in crosssection and; are preferably a seam thatis formed by bending the edge portionof the sheet-metal back upon. itself as; shown at l8 in Figure 3 and then folding the remaining edge portion downward as shown in IQ of" Figure 3-so that narrow channels are provided at the lower edgesof thetop section to receive the margins of the lower section B of; the shoe. Thisformation, or means for interengagingthe two sections of the shoeextends along both bottom edges of the U -shaped portion and both bottom edges of the semicylindrical extension ofsection A.

The section B of the shoe,- like the section above-described; is formed integral from onepiece of sheet-metal. The portion of this sec-- tion which is nearest the furnace shell comprises the horizontal bottom wall 2| that extends across the open lower portion of the rectangular part of the upper section A to provide a closure therefor and at its-margins this wall is provided with opposite upstanding flanges 22 that enter the channels 20 at the marginsof the upper'section. The remainder of section B is arouate andsome what semi-cylindrical in form and is disposed oblique to the plane-of: the wall 2|. The semi-- cylindrical or arcuate portion is identified as 23'- in the drawing. The longitudinal margins 24 of this portion of section B are substantially straight and are interengaged with the channel 2% in the proximate margin of the semi-cylindri cal part of upper section A.

As shown in Figure 3-, after the upstanding flanges 22 have been inserted into thechannel 20, the extreme outer edges of the bent-down portions l9 are folded or turned under and fiat against the wall 2| as at 19a to maintain the rectangular portion of the sections A and B in assembly. The arcuate or semi-cylindrical walls of the sections A and B, after the margins have been interengaged, are held in position by clamping bolts 25 that pass through the lateral portions of L- shape brackets 26 riveted to the respective walls of the cylindrical portion so, that the walls are drawn together by nuts 21 screwed on the threaded ends of the bolts 25. Prior to the drawing together of the arcuate portions of the sections. A and B, theflared flange l2 of the pipe or elbow section 6 is placed in the interior channel formed by the bead l3-|4 in which position the pipe section C may be rotated upon its axis until its outer edge is in the position desired for the run of the return conduit. After this adjustment has been made the sections are clamped together. 1 i

From theforegoing it'will be seen that the section A and the section B when separate from each otherare capable of h-aving'a plurality of the corresponding sections nested in each other for compact storage and shipment. The structure may readily be knocked down by removing the bolts 25 and bystraightening out the folded-under. portion I-Qw inthe manner shown in the dotted linesshown in Figure 3.

What I claim is: I r

A knock-down shoe and the like for furnaces adapted for assembly at the place of use, saidshoecomprising a cylindrical wall member disposed in upstanding position, and a. separable member having detachable connection with the lower edge of said cylindrical wall member; said separable member embodying upper and lower wall sections having meetingedges in horizontal and oblique planes, said wall sections together providing horizontal and oblique ducts the-latter of Whichducts communicatesv with the duct provided bysaid cylindrical wall member, and means for detachably securing said upper and lower wall sections together whereby the ends of the walls of the oblique duct are detachably assembled with the proximate edge of said cylindrical wall member, one of said sections having a U-shaped channel at each sidethereof receiving the adja-- cent edge of the other section, one side of said U-shaped channel having an extension thereon in position to 'be turned overaon an angular portion of the other section to secure said sections in assembled relation.

JOHN'J. HOLUB 

